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08-10-2002, 05:14 PM
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CC Member
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Join Date: May 2002
Location: Ashburton, New Zealand,
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Cobra Make, Engine: UK Ram SC. KC-Yates 373, Jerico 5 speed.
Posts: 1,240
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Not Ranked
Master cylinder sizing?
I am fitting a Tilton overhung pedal assembly to my Almac Cobra, and have fitting Wilwood Billet Calipers sized 1.88/1.62 pistons, and on the back its T/Bird standard 44mm piston calipers, so I need to know what size Master cylinders to use, I realise it may be in the 7/8 - 1" area for the rear and 3/4 - 13/16" for the front???
Anyones experience gratefully appreciated - Ant
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08-10-2002, 08:43 PM
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CC Member
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Join Date: Mar 2000
Location: Virginia, USA,
VA
Cobra Make, Engine: Genuine original Unique MotorCars 427 S/C, with a Genuine original Ford 427 Side-oiler.
Posts: 309
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Not Ranked
Ant,
Welcome to CC.
Check out Wilwood's website:
http://www.wilwood.com/
They have a tech section, and I think I remember seeing a formula to help determine m/c sizes.
There are way too many variables to just take a stab at it, ie: pedal ratio, rotor diameter, caliper piston diameter, vehicle weight, tire size, etc.
Good luck,
__________________
David
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08-11-2002, 12:03 AM
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CC Member
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Join Date: May 2002
Location: Ashburton, New Zealand,
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Cobra Make, Engine: UK Ram SC. KC-Yates 373, Jerico 5 speed.
Posts: 1,240
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Not Ranked
Thanks David for the welcome to the CC!
Will look into the Tech section and see what I come up with!
Ant
__________________
A J. Newton
The 1960's rocked!
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08-11-2002, 07:16 PM
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Senior Club Cobra Member
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Join Date: Nov 2001
Location: Kountze,
TX
Cobra Make, Engine: CMC, 351 Cleveland, Dual Quads, C6
Posts: 1,377
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Not Ranked
Call Tilton's tech line. I guarantee they will give you the right ones to use. All you need to do is give them a little info and they will advise. Later, David.
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08-12-2002, 07:21 AM
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CC Member
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Join Date: Mar 2000
Location: Fairfield, NJ, USA,
NJ
Cobra Make, Engine: A & C, 351W, Tremec 3550. Exiled Member: Club Cranky
Posts: 5,897
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Not Ranked
Tilton tech line is (805) 688-2353
Roscoe
__________________
Roscoe
"Crisis occurs when women and cattle get excited!"....James Thurber
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08-31-2002, 10:23 AM
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CC Member
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Join Date: Mar 1999
Location: TACOMA,
WA
Cobra Make, Engine: Everett Morrision FE 427 so 2-4s
Posts: 2,008
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Not Ranked
I have mid size GM calipers on 10 1/2' front and Jag rear.I'm running two 3/4" Tilton masters w/ a adjustable balance bar between. They work fine. You know the commercial where the guy stops so fast for a rabbit that the paint slips off the front of his car ?Thats me .Clutch is a 7/8" and have no free travel or not enough release.Moving up to a 15/16" master cyl for clutch.
__________________
Mike H
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08-31-2002, 01:10 PM
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CC Member
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Join Date: Mar 2000
Location: Fairfield, NJ, USA,
NJ
Cobra Make, Engine: A & C, 351W, Tremec 3550. Exiled Member: Club Cranky
Posts: 5,897
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Not Ranked
Mike,
I don't have my notes infront of me but I think you should be going down on the clutch m/c. I'm running a Tilton hydraulic bearing and believe Tilton told me 5/8 m/c. Why don't you give them a call before you go out and buy the new cylinder.
Roscoe
__________________
Roscoe
"Crisis occurs when women and cattle get excited!"....James Thurber
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09-01-2002, 02:25 AM
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CC Member
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Join Date: May 2002
Location: Ashburton, New Zealand,
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Cobra Make, Engine: UK Ram SC. KC-Yates 373, Jerico 5 speed.
Posts: 1,240
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Not Ranked
Hi Mike
I emailled the Tech officer at Wilwood and he recommended two 13/16" master cylinders to go with my setup, which to me makes good sense.
What I am not sure of is the clutch master, most people run 3/4" but I guess that depends on what type of throw out bearing and pressure plate design.
I will be running a single driven plate of about 10.5 - 11" probably kevlar or something that is good for the road mainly, but will handle a hammering around the circuit.
Ant
__________________
A J. Newton
The 1960's rocked!
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